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From 40af0a280cad30194c5ced83f6462c304d2f8c92 Mon Sep 17 00:00:00 2001
From: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Date: Wed, 16 Dec 2020 12:49:16 -0800
Subject: [PATCH] i2c: aspeed: clear slave addresses in probe
Initial value of I2CD18 is undefined according to the datasheet
so this commit adds the I2CD18 register clearing code into bus
initialization function to prevent any unexpected slave match
events.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Change-Id: I6c6cadeaf6fefcf74eba0d96c49986a810ccbb51
---
drivers/i2c/busses/i2c-aspeed.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
index d622ca14eb2a..d48489c803a8 100644
--- a/drivers/i2c/busses/i2c-aspeed.c
+++ b/drivers/i2c/busses/i2c-aspeed.c
@@ -1610,6 +1610,9 @@ static int aspeed_i2c_probe_bus(struct platform_device *pdev)
writel(0, bus->base + ASPEED_I2C_INTR_CTRL_REG);
writel(0xffffffff, bus->base + ASPEED_I2C_INTR_STS_REG);
+ /* Clear slave addresses. */
+ writel(0, bus->base + ASPEED_I2C_DEV_ADDR_REG);
+
parent_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(parent_clk))
return PTR_ERR(parent_clk);
--
2.17.1
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